Lifestyle Determinants of Hypertension among Government School Adolescents: A Cross-sectional Study

Background: Obesity is associated with increased risk for high blood pressure (BP). Although a routine BP measurement is indicated for all children visiting pediatric practice, recognition of children particularly at risk may save times. The aim of this study was to assess the cut-off point for body mass index (BMI) and waist-to-height ratio (WHtR) to predict high BP in adolescents. Methods: We conducted a cross-sectional study on 928 children aged 11 to 16 years in Yogyakarta. BP were measured using standard technique described by The Fourth Report on The Diagnosis, Evaluation, and Treatment of High Blood Pressure in Children and Adolescents. BMI was adjusted for age and sex using the WHO 2007 growth reference. WHtR was ratio of waist circumference related to height in centimeters. Receiver operating characteristic (ROC) curves were used to estimate the best cut-offs. Results: The best cut-off point for BMI-for-age Z-score (BMIZ) to predict high BP was 0.51 with sensitivity and specificity of 82% (95% CI = 78-86) and 76% (95% CI = 67-78) for systolic BP and sensitivity and specificity of 82% (95% CI = 78-86) and 72% (95% CI = 68-76) for diastolic BP. The best cut-off point for WHtR was 0.45, with sensitivity of 76% (95% CI = 67-78) and specificity of 74% (95% CI = 71-79) for systolic BP and sensitivity of 76% (95% CI = 72-80) and specificity of 70% (95% CI = 61-75) for diastolic BP.Conclusion: BMIZ of 0.51 and WHtR of 0.45 are the best cut-off point to predict high BP in adolescents.

The number of visits and blood pressure measurements influence the prevalence of high blood pressure in adolescents

Analysis of different anthropometric indicators in the detection of high blood pressure in school adolescents: a cross-sectional study with 8295 adolescents

The prevalence of high blood pressure in adolescence is increasing with the number of adolescence at risk of overweight or overweight. Due to the known relationship between high blood pressure and increased risk of coronary artery disease (CAD) and stroke, this is an obvious health concern for adolescent children. PURPOSE: To characterize the incidence of high normal blood pressure and hypertension in a large population of ninth grade, physical education students. METHODS: 884 ninth grade, physical education students (14 ± 1 yrs) participated. Blood pressure was initially recorded with an automated device (Omron, HEM-907XL). If the initial automated reading was above 120/80 mmHg, then a manual ausculatory re-measurement was taken. Blood pressure was classified as high normal blood pressure if the reading fell between the 90th and 95th percentile based on the CDC growth charts (National high blood pressure education program working group on high blood pressure in children and adolescents, 2001), while hypertension was defined as a reading above the 95th percentile. Frequency of high normal blood pressure and hypertension was calculated for two groups based on BMI: at risk for being overweight or overweight students and normal weight students. RESULTS: Overall, 8.5% of students were classified as having high normal blood pressure and 4.8% were considered hypertensive. The incidence was greater for high normal blood pressure for the at risk for being overweight or overweight group (11.9%) compared to the normal weight students (7.4%). Hypertension was present in 7.3% of the at risk for being overweight or overweight population and 3.9% of the normal weight population. The at risk for being overweight or overweight group and normal weight group had a mean systolic blood pressure of 117.5 ± 9 mmHg and 112.8 ±10 mmHg, respectively, and a mean diastolic blood pressure of 64.7 ± 7 mmHg and 61.2 ± 8 mmHg, respectively. CONCLUSION: Our data indicates that a large percentage of the at risk for being overweight or overweight population (19.2%) has elevated blood pressure. At risk for being overweight or overweight students have a greater incidence of high normal blood pressure, and are twice as likely as normal weight students to have hypertension. The at risk for being overweight or overweight group also has a higher mean systolic and diastolic blood pressure values. This is alarming because elevated blood pressure is associated with an increased risk of CAD and stroke, and is in itself a progressive chronic disease.

BackgroundAnthropometric indicators of obesity have been associated with blood pressure in adolescents. However, the accuracy of anthropometric indicators of obesity for screening for high blood pressure (HBP) in adolescents is not known. Thus, the aim of the present study was to summarize the set of evidence regarding the predictive ability of anthropometric indicators of obesity to identify HBP in adolescents.MethodsSearches were performed in five databases: MEDLINE, Web of Knowledge, Scopus, Scientific Electronic online (SciELO) and SportDiscus. The inclusion criteria for studies were: adolescents aged 10–19 years or mean age included in this range, observational and intervention studies, studies that proposed cutoff points for anthropometric indicators of obesity, and studies in English, Portuguese and Spanish. The methodological quality of studies was assessed using the QUADAS-2 instrument.ResultsTen studies met the inclusion criteria and had their information summarized. Based on the information described in these studies, the anthropometric indicators body mass index (BMI), waist circumference (WC), waist-to-height-ratio (WHtR), triceps skinfold thickness, body adiposity index, C index, body mass, waist-to-arm span ratio, arm fat area, average arm perimeter, fat percentage and arm span were likely to be used in high blood pressure (HBP) screening among adolescents. However, only one study showed acceptable values (moderate to high precision) in relation to the accuracy measurements of described cutoffs.ConclusionCaution is suggested in the use of anthropometric indicators of obesity for HBP screening in adolescents, in which a greater number of studies with accurate diagnostic tools are necessary.

Background Pediatric hypertension is an emerging health issue due to its increasing prevalence. Age-, gender-, and height-specific blood pressure percentiles have been widely used as a primary tool for detection of hypertension in the pediatric population. However, this method is too complicated to be used in general pediatric practice. The blood pressure to height ratio has been proposed as a practical tool to detect hypertension in children.
 Objective To evaluate the accuracy of blood pressure to height ratio to be used as a tool for screening high blood pressure in Indonesian adolescents.
 Methods This diagnostic test study using data from the 2013 Indonesia Basic Health Research (Riset Kesehatan Dasar/RISKESDAS) report included 39,057 adolescents aged 15-18 years with complete data on age, gender, weight, height, and blood pressure. Blood pressure values were classified using the 2017 American Academy of Pediatrics (AAP) hypertension clinical guidelines. Blood pressure to height ratio was calculated as mmHg/cm body height. A receiver-operator characteristics (ROC) curve analysis was performed to assess the accuracy of systolic blood pressure to height ratio (SBPHR) and diastolic blood pressure to height ratio (DBPHR) for screening high blood pressure in adolescents. The optimal cut-off points, sensitivity, and specificity of SBPHR and DBPHR were calculated.
 Results The optimal cut-off points for defining elevated blood pressure in male adolescents aged 13-18 years were SBPHR 0.69 for male adolescents (sensitivity 96%, specificity 80%) and DBPHR 0.46 (sensitivity 97%, specificity 84%). In female adolescents, the optimal cut-offs were SBPHR 0.72 (sensitivity 97%, specificity 82%) and DBPHR 0.48 (sensitivity 98% and specificity 79%).
 Conclusion Blood pressure to height ratio is a practical method with high sensitivity and specificity for detecting elevated blood pressure in Indonesian adolescents aged 15 to 18 years.

In 2007 the International Diabetes Federation (IDF) proposed single blood pressure (BP) cutpoints (systolic: ≥130 mm Hg and diastolic: ≥85mm Hg) for the diagnosis of high blood pressure (HBP) in adolescents. Before this proposal, HBP had been defined as BP at or above the 95th percentile for age, sex, and height percentile (reference standard). In this study, we evaluated the risk for misclassification when using the IDF single-cutpoints criteria. We first applied the IDF criteria to a reconstructed population with the same age, sex, and height distribution as the population used to develop the reference standard. The proposed single cutpoints corresponded to percentiles from the 81.6th to 99.9th for systolic BP and from the 92.9th to 98.9th for diastolic BP in the reconstructed population. Using IDF criteria, there were high false-negative fractions for both systolic and diastolic BP (from 54% to 93%) in 10- to 12-year-olds and a false-positive fraction up to 35% in older subjects. We then applied the IDF criteria to 1,162 overweight/obese adolescents recruited during 1998-2000 from pediatric clinical centers in Milano, Varese, and Modena in Italy and in Zaragoza, Spain. Overall false-negative and false-positive fractions were 22% and 2%, respectively; negative predictive values were especially low for 10- to 12-year-old subjects. The use of IDF's single cutpoints carries a high risk of misclassification, mostly due to false negatives in younger subjects. The effort to simplify diagnosis could be overcome by the risk of undiagnosed HBP.

Although previous studies have analyzed the association between cardiovascular risk factors and blood pressure in adolescents, few studies conducted in developing countries analyzed whether the aggregation of risk factors contributes to an increased risk of high blood pressure in adolescents. The objective of this study was to assess the association between cardiovascular risk factors (including general overweight, abdominal obesity, high consumption of foods rich in fats, and insufficient physical activity levels) and high blood pressure in adolescents. This study was carried out from 2007 to 2008 with 1021 adolescents (528 girls) from primary schools located in the city of Londrina- Brazil. Blood pressure was assessed using an oscillometric device. General overweight was obtained through body mass index, abdominal obesity was assessed using waist circumference, and the consumption of foods rich in fat and physical activity were assessed using a questionnaire. The sum of these risk factors was determined. Adolescents with three or four aggregated risk factors were more likely to have higher values of systolic and diastolic blood pressure when compared with adolescents who did not have any cardiovascular risk factors (P = 0.001 for both). Logistic regression indicated that groups of adolescents with 2 (OR= 2.46 [1.11-5.42]; P = 0.026), 3 (OR= 4.97 [2.07-11.92]; P = 0.001) or 4 risk factors (OR= 6.79 [2.24-19.9]; P = 0.001) presented an increased likelihood of high blood pressure. The number of cardiovascular risk factors was found to be related to high blood pressure in adolescents.

ABSTRACTObjective: To review the epidemiological evidence of the association between sleep duration and blood pressure in adolescents.Data sources: We performed a systematic review of observational studies in Medline, Scopus, Lilacs, Web of Science, Science Direct databases and Virtual Libraries in English, Spanish and Portuguese published until September 2018. Studies were selected first by title and abstract, then by complete reading, according to the eligibility criteria. The reference list of selected articles was evaluated in order to retrieve relevant studies.Data synthesis: Initially, 1,455 articles were retrieved. After exclusion due to duplicity or not meeting the eligibility criteria, 13 articles were included in the review. Studies varied greatly in sample size (143 to 6,940 patients), methods of measuring blood pressure and sleep duration, cutoff points, categorization and adjustment of variables. The main evidence from the studies is that short sleep duration is associated with high blood pressure in adolescence, although the presence of association between high blood pressure and long sleep duration is possible, but not clear in the literature.Conclusions: Sleep duration, especially short duration, is associated with high blood pressure in adolescents. Such evidence draws attention to implications on cardiovascular health in this age group.

The incidence of hypertension in adulthood begins with an increase in blood pressure since adolescence and high blood pressure in adolescents is also associated with an increased risk of Chronic Heart Disease (CHD) as an adult. Consumption of natrium may lead positively associated with an increase in blood pressure in adolescence. The novelty of this study is because it examines the relationship between sodium consumption and blood pressure in adolescent girls. This study aims to analyze the relationship between sodium consumption and blood pressure in adolescent girls in Tasikmalaya, West Java. This research is an observational study with a cross-sectional study design. The population in this study were all female adolescents aged 12-18 years. The independent variables in this study were total sodium consumption, sodium consumption in snacks, sodium consumption in the main menu and sodium contribution from snacks. The natrium intake was measured by non consecutive recall method. The dependent variable was blood pressure measured by sphygmomanometer Omron HEM8712. The data were analyze by Pearson product moment test. The average total sodium consumption is 506.6mg and blood pressure is 113mmH. There was a positive relationship between total daily sodium (p=0.00; r=0.240), sodium in snacks (p=0.002; 0.162), and sodium in daily menus (p=0.001; r-0.182) with blood pressure. The conclusion natrium intake was correlated with blood pressure in adolescent girls, therefore, they should aware with high sodium food.Keywords : Sodium; Blood pressure; Snacks; Adolescent girls.

The purpose of this study was to estimate the prevalence of high blood pressure (HBP) in adolescents of the Valencian Autonomous Community (VC) in Spain. Besides, its association with other risk factors related to cardiovascular disease (CVD) or arterial hypertension (AHT) in order to increase our knowledge of public health and to provide advice about healthy diets. We conducted a multicentre, observational, cross-sectional, epidemiological study in a sample of 4402 adolescents from 15 schools during the 2015–2016 school year. The participants were aged between 11 and 18 years, and any individuals already diagnosed with AHT were excluded. In addition to the Physical Activity Questionnaire for Adolescents (PAQ-A), Evaluation of the Mediterranean Diet Quality Index (KIDMED), a lifestyle habits survey, the waist-to-height ratio (WtHR), and body mass index (BMI) were calculated for each participant. Informed Consent was obtained from Parents of the adolescents involved in the current study. The study received approval from the University ethics committee and all procedures were conducted in accordance with the tenets of the Declaration of Helsinki. Chi-squared, Student t-tests, and ANOVA statistical analyses showed that 653 (14.8%) adolescents had previously undiagnosed HBP and that was significantly associated with male sex (p < 0.001), age over 15 years (p < 0.05), and height, weight, waist circumference, WtHR, BMI, and skipping breakfast. Based on the data we obtained in this study, the modifiable factors that influence HBP in adolescents were WtHR, BMI, and skipping breakfast.

Objective: To analyze the influence of different number of blood pressure measurement on the detection of elevated blood pressure in Tibetan adolescents and provide scientific reference for standardizing the number of blood pressure measurement and accurately diagnosing elevated blood pressure in adolescents. Methods: Data were from the project "survey of the risk factors for elevated blood pressure among Tibetan adolescents" conducted from August to September 2018 in Shigatse in Tibet. A total of 2 822 Tibetan adolescents aged 12-17 years, including 1 275 boys (45.2%), were recruited by a convenient, stratified cluster sampling method. Each participant underwent three consecutive blood pressure measurements. Elevated blood pressure was defined according to the Health Industry Criterion of China: WS/T 610-2018 "Reference of screening for elevated blood pressure among children and adolescents aged 7-18 years" . Analysis of variance and χ(2) test were used to analyze the effect of different blood pressure measurement on blood pressure levels and detection of elevated blood pressure, respectively. Results: SBP and DBP decreased substantially across three consecutive blood pressure measurements[SBP: (112.7±9.7), (110.7±9.7) and (110.2±9.5) mmHg (1 mmHg=0.133 kPa); DBP: (62.7±8.2), (61.1±8.5) and (60.6±8.5) mmHg; P value for trend<0.001]. The detection rates of elevated blood pressure based on three blood pressure measurements were 12.8%, 8.7% and 7.9%, respectively (P value for trend <0.001). Of note, the difference in the detection of elevated blood pressure based on the second blood pressure measurement or based on the average value of the second and third blood pressure measurements showed no significance (8.7% and 7.2%, P=0.039). Conclusions: Blood pressure levels and the detection of elevated blood pressure in adolescents decreased substantially across three consecutive blood pressure measurements. The second blood pressure measurement might be sufficient for screening elevated blood pressure in adolescents.

Introduction: excess adiposity is one of the main risk factors for cardiovascular diseases, including high blood pressure. Children and adolescents with obesity and hypertension are at greater risk of morbidity and mortality in adulthood. Objective: to analyze the association between excess peripheral, central and general adiposity with high blood pressure in adolescents in southern Brazil. Methods: this is a cross-sectional study with 1,132 adolescents (16.50 ± 1.14 years) of both sexes. Measurements were performed with the oscillometric method using digital sphygmomanometer, considering high systolic and diastolic blood pressure, values above the 95th percentile for sex and age. Peripheral adiposity (triceps skinfold) and central adiposity (subscapular skinfold) were classified as high from the 90th percentile of the Centers for Disease Control and Prevention reference distribution. For excess general adiposity, triceps and subscapular skinfold above the 90th percentile were simultaneously considered. Logistic regression was used with 5% significance level. Results: male adolescents with high peripheral, central and general adiposity were, respectively, 2.43 (95% CI: 1.14; 5.19), 3.50 (95% CI: 1.66; 7.41) and 2.47 (95% CI: 1.01; 6.18) times more likely of having high SBP. Male adolescents with excess general adiposity were more likely of developing high diastolic blood pressure (OR: 3.31; 95% CI: 1.41; 7.70). Female adolescents with excess central and general adiposity were 4.15 (95% CI: 1.97; 8.77) and 3.30 (95% CI: 1.41; 7.77) times more likely of developing high diastolic blood pressure, respectively. Conclusion: male adolescents with excess peripheral, central and general adiposity were more likely of having high systolic blood pressure and high diastolic blood pressure when presenting high general adiposity. In addition, female adolescents with high excess central and general adiposity were more likely of having high diastolic blood pressure.

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